Buggy code:
static final int QUALIFIED_ALLOCATION = - 5 ; static final int QUESTION = 1 ; static final int COLON = 2 ; static final int LPAREN_NOT_CONSUMED = 1 ; static final int LPAREN_CONSUMED = 2 ; int invocationType ; int qualifier ; int lastModifiers = AccDefault ; int lastModifiersStart = - 1 ; int bracketDepth ; int canBeExplicitConstructor = CompletionParser . NO ; static final int NO = 0 ; static final int NEXTTOKEN = 1 ; static final int YES = 2 ; boolean isAlreadyAttached ; public CompletionParser ( ProblemReporter problemReporter ) { } public char [ ] assistIdentifier ( ) { } protected void attachOrphanCompletionNode ( ) { } private void buildMoreAnnotationCompletionContext ( MemberValuePair memberValuePair ) { } private void buildMoreCompletionContext ( Expression expression ) { } private void buildMoreGenericsCompletionContext ( ASTNode node ) { } public int bodyEnd ( AbstractMethodDeclaration method ) { } public int bodyEnd ( Initializer initializer ) { } private boolean checkCatchClause ( ) { } private boolean checkClassInstanceCreation ( ) { } private boolean checkClassLiteralAccess ( ) { } private boolean checkKeyword ( ) { } private boolean checkInstanceofKeyword ( ) { } private boolean checkInvocation ( ) { } private boolean checkMemberAccess ( ) { } private boolean checkNameCompletion ( ) { } private boolean checkParemeterizedType ( ) { } private boolean checkRecoveredMethod ( ) { } private boolean checkMemberValueName ( ) { } private boolean checkRecoveredType ( ) { } public void completionIdentifierCheck ( ) { } protected void consumeArrayCreationExpressionWithInitializer ( ) { } protected void consumeArrayCreationExpressionWithoutInitializer ( ) { } protected void consumeArrayCreationHeader ( ) { } protected void consumeAssignment ( ) { } protected void consumeAssignmentOperator ( int pos ) { } protected void consumeBinaryExpression ( int op ) { } protected void consumeBinaryExpressionWithName ( int op ) { } protected void consumeCaseLabel ( ) { } protected void consumeCastExpressionWithPrimitiveType ( ) { } protected void consumeCastExpressionWithGenericsArray ( ) { } protected void consumeCastExpressionWithQualifiedGenericsArray ( ) { } protected void consumeCastExpressionWithNameArray ( ) { } protected void consumeCastExpressionLL1 ( ) { } protected void consumeClassBodyDeclaration ( ) { } protected void consumeClassBodyopt ( ) { } protected void consumeClassHeaderName1 ( ) { } protected void consumeClassHeaderExtends ( ) { } protected void consumeClassTypeElt ( ) { } protected void consumeConditionalExpression ( int op ) { } protected void consumeConditionalExpressionWithName ( int op ) { } protected void consumeConstructorBody ( ) { } protected void consumeConstructorHeader ( ) { } protected void consumeConstructorHeaderName ( ) { } protected void consumeDefaultLabel ( ) { } protected void consumeDimWithOrWithOutExpr ( ) { } protected void consumeEnterAnonymousClassBody ( ) { } protected void consumeEnterVariable ( ) { } protected void consumeEqualityExpression ( int op ) { } protected void consumeEqualityExpressionWithName ( int op ) { } protected void consumeExitVariableWithInitialization ( ) { } protected void consumeExplicitConstructorInvocation ( int flag , int recFlag ) { } protected void consumeFieldAccess ( boolean isSuperAccess ) { } protected void consumeForceNoDiet ( ) { } protected void consumeFormalParameter ( boolean isVarArgs ) { if ( ( this . indexOfAssistIdentifier ( ) ) < 0 ) { super . consumeFormalParameter ( isVarArgs ) ; } else { ( identifierLengthPtr ) -- ; char [ ] identifierName = identifierStack [ identifierPtr ] ; long namePositions = identifierPositionStack [ ( ( identifierPtr ) -- ) ] ; int extendedDimensions = this . intStack [ ( ( this . intPtr ) -- ) ] ; int endOfEllipsis = 0 ; if ( isVarArgs ) { endOfEllipsis = this . intStack [ ( ( this . intPtr ) -- ) ] ; } int firstDimensions = this . intStack [ ( ( this . intPtr ) -- ) ] ; final int typeDimensions = firstDimensions + extendedDimensions ; TypeReference type = getTypeReference ( typeDimensions ) ; if ( isVarArgs ) { <START_BUG> type = type . copyDims ( ( typeDimensions + 1 ) ) ; <END_BUG> if ( extendedDimensions == 0 ) { type . sourceEnd = endOfEllipsis ; } type . bits |= ASTNode . IsVarArgs ; } intPtr -= 2 ; CompletionOnArgumentName arg = new CompletionOnArgumentName ( identifierName , namePositions , type , ( ( intStack [ ( ( intPtr ) + 1 ) ] ) & ( ~ ( AccDeprecated ) ) ) ) ; int length ; if ( ( length = this . expressionLengthStack [ ( ( this . expressionLengthPtr ) -- ) ] ) != 0 ) { System . arraycopy ( this . expressionStack , ( ( this . expressionPtr -= length ) + 1 ) , ( arg . annotations = new Annotation [ length ] ) , 0 , length ) ; } arg . isCatchArgument = ( topKnownElementKind ( CompletionParser . COMPLETION_OR_ASSIST_PARSER ) ) == ( CompletionParser . K_BETWEEN_CATCH_AND_RIGHT_PAREN ) ; pushOnAstStack ( arg ) ; assistNode = arg ; this . lastCheckPoint = ( ( int ) ( namePositions ) ) ; isOrphanCompletionNode = true ; ( listLength ) ++ ; } } protected void consumeInsideCastExpression ( ) { } protected void consumeInsideCastExpressionLL1 ( ) { } protected void consumeInsideCastExpressionWithQualifiedGenerics ( ) { } protected void consumeInstanceOfExpression ( int op ) { } protected void consumeInstanceOfExpressionWithName ( int op ) { } protected void consumeInterfaceHeaderName1 ( ) { } protected void consumeInterfaceHeaderExtends ( ) { } protected void consumeInterfaceType ( ) { } protected void consumeMethodInvocationName ( ) { } protected void consumeMethodInvocationPrimary ( ) { } protected void consumeMethodInvocationSuper ( ) { } protected void consumeMethodHeaderName ( boolean isAnnotationMethod ) { } protected void consumeMethodHeaderRightParen ( ) { } protected void consumeMethodHeaderExtendedDims ( ) { } protected void consumeAnnotationName ( ) { } protected void consumeMarkerAnnotation ( ) { } protected void consumeMemberValuePair ( ) { } protected void consumeMemberValueAsName ( ) { } protected void consumeMethodBody ( ) { } protected void consumeMethodHeader ( ) { } protected void consumeModifiers ( ) { } protected void consumeReferenceType ( ) { } protected void consumeRestoreDiet ( ) { }

Fix:
type = copyDims ( type , ( typeDimensions + 1 ) ) ;